Paracelsian Chiari G, Gazzoni G, Craig J R, Gibbs G V, Louisnathan S J American Mineralogist 70 (1985) 969-974 Two independent refinements of the structure of paracelsian, BaAl2Si2O8 Locality: Benallt Mine, Carnarvonshire, U.K. Sample: CG refinement _database_code_amcsd 0000997 9.072 9.588 8.577 90 90.21 90 P2_1/a atom x y z Uiso Ba .89778 .41169 .25051 .008 Al1 .06389 .19453 .57128 .005 Si1 .06737 .19879 .93951 .005 Al2 .22539 .92092 .93134 .005 Si2 .23099 .91692 .56341 .006 O1o .1953 .0886 .9985 .010 O1m .1935 .0737 .5044 .010 O2o .1285 .3604 .9569 .008 O2m .1313 .3632 .5450 .008 O3o .9273 .1850 .0575 .010 O3m .9117 .1852 .4494 .010 O4 .0192 .1666 .7632 .013 O5 .2936 .9107 .7422 .011